PLATE LUI 
Fig. i.—Cross section of a white oak, showing fully developed tyloses ( T ) in the 
large vessels (F). 
Fig. 2.—Radial-longitudinal view, quarter-sawed surface, of the white oak shown 
in figure i, showing complete closing of the vessel (V), which makes this wood 
valuable in light cooperage, etc. 
Fig. 3.—Cross section of sap wood of pignut hickory, showing fully developed 
tyloses (T). 
Fig. 4.—Radial view of mesquite, showing “gum” droplets ( G ) and formations 
often stimulating tyloses. 
